A note on eigenvalues of ordinary differential operators.

Título inglés	A note on eigenvalues of ordinary differential operators.
Título español	Nota sobre autovalores de operadores diferenciales ordinarios.
Autor/es	Ho, Alan
Organización	Dep. Math. Princeton Univ., Princeton (New Jersey), Estados Unidos
Revista	0213-2230
Publicación	1997, 13 (2): 403-410, 1 Ref.
Tipo de documento	articulo
Idioma	Inglés
Resumen inglés	In this follow-up on the work of Fefferman-Seco [FS] an improved condition for the discrete eigenvalues of the operator -d2 / dx2 + V(x) is established for V(x) satisfying certain hypotheses. The eigenvalue condition in [FS] establishes eigenvalues of this operator to within a small error. Through an obervation due to C. Fefferman, the order of accuracy can be improved if a certain condition is true. This paper improves on the result obtained in [FS] by showing that this condition does indeed hold.
Clasificación UNESCO	120201
Palabras clave español	Operadores diferenciales ; Autovalores
Código MathReviews	MR1617641
Código Z-Math	Zbl 0903.34071
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